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Last seen: Nov 3, 2025
@derek-m this is from my estimated house heat loss based on room by room assessment @ 10 degrees. However these figures just don't represent real worl...
@derek-m its basically a real world heat loss calculation / EPC - I could work our heat loss per average ambient by keeping a log
@derek-m trying to understand what 11kw means. If the house is 70m2 it seems a lot. I used 17kw yesterday to achieve the same results, but my house is...
@kev-m whats the size of your house?
@kev-m yes that's the whole house. I do have a little CT clamp meter on the HP, so I can see what its drawing. But its not recorded, I just look in as...
@kev-m It'll be a mix of hot water (for the showers), my wife's hair dryer, washing machine going on etc. This measures power in 5 min intervals, so i...
@derek-m there is a bit of cycling on the system due to the super mild weather (ambient was 13 overnight). However its very wet today, so interesting ...
Ran through the night with a COP of 4.2 - Lost some heat downstairs though, the temperature dropped to 20. So I've adjusted my curve 1 degree upwards;...
@jeff I think we'll end up with a system based on weather curves from heat loss calcs. I dont see why its not possible given we know the size of heat ...
room temperature hit 21.5 again today, so trimmed the weather comp at the bottom end a little. Its not exactly sunny, so solar gain should be negligib...
Checked the filter today and it was pretty much totally clean - so I think the gunk is now cleaned out. The system is basically silent now as well, wh...
@rv3 is your weather compensation turned on? That would be step 1
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Latest Posts
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@susannasaunders can I just add to @rob-of-york s comm...
By JamesPa , 17 minutes ago
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
By JamesPa , 29 minutes ago
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
By Batpred , 1 hour ago
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Good to hear that you found a solution. Absolutely a...
By Batpred , 2 hours ago
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
I know most of the folks I use pretty well so I'm fairl...
By EtchedPixels , 10 hours ago
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RE: Are there any comparisons of DHW heat stores around?
@sarahemmm I have done things the opposite way round I ...
By Toodles , 16 hours ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews I have read you latest response re buffer ...
By JamesPa , 1 day ago
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
By Rob of York , 2 days ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 4 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
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RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 5 days ago
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@transparent we’re still running a secure version of PH...
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